Subtract 21/18 from 60/70
1st number: 60/70, 2nd number: 1 3/18
60/70 - 21/18 is -13/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
60/70 = 60 × 9/70 × 9 = 540/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
21/18 = 21 × 35/18 × 35 = 735/630 - Subtract the two like fractions:
540/630 - 735/630 = 540 - 735/630 = -195/630 - After reducing the fraction, the answer is -13/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70-42/18 60/70-21/36 60/70-63/18 60/70-21/54 60/70-21/90